Fastener for telephone-transmitters.



A. J. GATTERMEIR.

FASTENER FOR TELEPHONE TRANSMITTERS.

APPLICATION FILED JULY 17,1915.

Patented Mar. 7, 1916.

. l/VVE/V TOR A/Zee Jkfferm 6Z7 WITNESSES ATTORNEYS THE COLUMBIA PLANOGRAPH cm, WASHINGTON, D. c.

ALLE E JOSEPH GATTERMEIR, OF CALIFORNIA, MISSOURI.

FASTENER FOR TELEPHONE-TRANSMITTERS.

Specification of Letters Patent.

Patented Mar. 7, 1916.

Application filed July 17, 1915. Serial No. 40,459.

To all whom it may concern:

Be it known that I, ALLEE J. GATTERMEIR, a citizen of the United States, and a resident of California, in the county of Moniteau and State of Missouri, have invented a new and Improved Fastener for Telephone- Transmitters, of which the following is full, clear, and exact description.

My invention relates to a means for detachably fastening a transmitter in position for use, the objects of the invention being to enable the transmitter to be removed or replaced in a fraction of the time usually involved by the use of screws; to enable the transmitter to be removed without the use of a screw driver or other special tools; to prevent the annoyance and loss of time due to the loss, breaking or wearing of screws and like fasteners, and to provide a very neat fastening means whereby to give the transmitter an improved appearance.

The invention also has for its object to provide a fastener for the indicated purpose, improved in various particulars with respect to simplicity, strength and efficiency.

The invention will be particularly explained in the specific description following.

Reference is had to the accompanying drawings forming part of this specification, in which similar characters of reference indicate corresponding parts in all the views, and in which:

Figure 1 is a rear View with the casing in section; Fig. 2 is a fragmentary view similar to Fig. 1, with the bridge plate removed; and Fig. 3 is a detail section on the line 3-3 of Fig. 2.

My invention is shown in connection with a known form of telephone, in which 10 is the base of the transmitter and 11 a bridge plate secured by screws 12 to a bolster 14 having screw holes 13 to receive the screws 12. The base 10 is formed with an annular flange 10*, outside of which the shell 15 is received carrying the usual mouth piece, not shown.

In order to secure the shell 15, or equivalent member carrying the usual mouth piece of the transmitter, I provide in the flange 10 of the base a fixed lateral stud 16 which projects beyond the flange 10 a suflicient distance to extend through a corresponding orifice in the shell 15, and at a point distant from the fixed stud 16 and preferably diametrically opposite the same, I provide a resiliently supported stud 17 movable through a corresponding orifice in the flange 10'' and receivable in an'orifice 15 in the shell 15.

The stud 17 is secured to a plate spring 18, and said spring is held in place by the bridge plate 11 and the adjacent bolster 1 1. As seen clearly in Fig. 2, the bolster-11 is formed with a slot 19 having members at an angle to each other, and the spring 18 is bent at the end opposite the stud 17 at an angle to correspond with members of the slot 19, so as to be snugly received in the latter. The securing of the spring is completed by the placing of the bridge plate 11 and fastening the same by screws 12. Thus the angular form of the slots 19 and spring 18 prevents the spring from becoming displaced in the direction of its length, while the bridge plate 11 overlies the springs and prevents its displacement in a forward direction.

lVith the described construction, the shell or equivalent member 15 carrying the mouth piece is first engaged with the fixed stud 16, and the shell is then snapped into engagement with the stud 17, said stud being slightly beveled to cause the shell to press the stud inward automatically as the edge of the shell engages the stud. In order to remove the shell, it is necessary only to press a pencil point or the like against the front of the stud 17 to disengage the same from the orifice 15*, whereupon the shell may be rocked with the fixed stud 16 as a pivot and thus completely disengaged from the base 10.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A transmitter including a base having a forwardly extending member thereon, a fixed stud, on said member projecting out ward therefrom, the base having a bolster and a bridge plate detachably secured to said bolster, the said bolster having a slot therein presenting members at an angle to each other, a plate spring having a bend therein corresponding with the angles of said slot and receivable in the latter, a stud carried on the said spring and projecting laterally through the said flange of the base and beyond the same, and a member adapted to support a mouth piece, said member having orifices therein to receive the said studs, and fitting the said base outside of the said annular flange.

2. A telephoneincluding a base having a detachable bridge plate and a bolster supporting the same,=said bolster having slots,

said bridge plate, a plate spring having a stud thereon extending laterally outward, means to secure' said spring to the bolster beneath the bridge plate, and a mouth piece supporting member seating on said base and detachably engaging said stud.

In testimony whereof I have subscribed my name to this specification in the presence of two subscribing witnesses.

ALLEE JOSEPH GATTERMEIR.

WVitnesses v N. C. HIoKcox, W. C. HEoK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

